diff --git a/samples/durable-functions/python/agent-directed-workflows/requirements.txt b/samples/durable-functions/python/agent-directed-workflows/requirements.txt
index 1395ae06..7b56e373 100644
--- a/samples/durable-functions/python/agent-directed-workflows/requirements.txt
+++ b/samples/durable-functions/python/agent-directed-workflows/requirements.txt
@@ -1,5 +1,5 @@
 azure-functions
 azure-functions-durable
 redis
-openai>=3.20.0
+openai>=3.28.0
 azure-identity>=1.25.3